Optimization of the Regional Municipality of Ottawa-Carleton's water supply system operations. I. Model development

1996 ◽  
Vol 23 (2) ◽  
pp. 347-357 ◽  
Author(s):  
Geneviève Pelletier ◽  
Ronald D. Townsend
Keyword(s):  
Water Supply ◽  
Distribution System ◽  
Model Development ◽  
Treatment Plant ◽  
Supply System ◽  
Water Supply System ◽  
Operating Costs ◽  
Pump Scheduling ◽  
Tariff Structure ◽  
The Impact

The principal objective of this study was to optimize pump scheduling and reservoir releases in the Regional Municipality of Ottawa-Carleton's (RMOC) water supply system with a view to reducing electricity-related operating costs. Pump schedules and reservoir releases for enhanced operation were obtained using a linear programming optimization model that incorporated Ottawa Hydro's electricity tariff structure for "large" users. A second objective was to investigate the impact on system operating costs of increasing (i) reservoir storage capacity, (ii) treatment plant capacity, and (iii) water demand by consumers. This paper (part I) describes the RMOC distribution system and reviews the model development. The next paper (part II) presents the analyses performed for the two study objectives, and important results. Key words: water supply system, pump scheduling, pumping costs, optimization, modelling.

Optimization of the Regional Municipality of Ottawa-Carleton's water supply system operations. II. Model results and analyses

1996 ◽  
Vol 23 (2) ◽  
pp. 358-372
Author(s):  
Geneviève Pelletier ◽  
Ronald D. Townsend
Keyword(s):  
Water Supply ◽  
Water Demand ◽  
Energy Savings ◽  
Treatment Plant ◽  
Preceding Paper ◽  
Supply System ◽  
Water Supply System ◽  
Operating Costs ◽  
Study Objective ◽  
Pump Scheduling

The principal objective of this study was to optimize pump scheduling and reservoir releases in the Regional Municipality of Ottawa-Carleton's (RMOC) water supply system with a view to reducing hydro-related operating costs. Basically, hourly demands are to be met with minimum pumping costs. The preceding paper (part I) describes the RMOC system and the numerical model used in the optimization analysis. This paper (part II) presents the main results obtained from the optimization and also reports on the second study objective, which was to investigate the impacts on system operating costs of increasing (i) reservoir storage capacity, (ii) treatment plant capacity, and (iii) water demand by consumers. In general, linear programming was found to be a good modelling option for generating optimized pump schedules and service reservoir releases. The analyses of water management alternatives confirmed that RMOC's water supply system was designed for maximum day water demand; however, day-to-day operations would be facilitated if present storage and (or) treatment facilities were enlarged. Economically, it would be difficult to justify construction costs from the potential energy savings obtained from this study and therefore it seems important to start managing demand. Key words: water supply system, pump scheduling, pumping costs, optimization, modelling.

scholarly journals OPTIMIZATION OF HIGH PREASURE PIPELINE IN THE PRESSURE PIPE OF WATER SUPPLY

2017 ◽  
Vol 1 (17) ◽  
Author(s):  
Nedim Suljić ◽  
Jasmin Hrnjadović
Keyword(s):  
Water Supply ◽  
Supply System ◽  
Water Supply System ◽  
Operating Costs ◽  
Complete Analysis ◽  
Pressure Pipe ◽  
Pressure Pipeline ◽  
Basic Parameters ◽  
Quality Water ◽  
The Impact

The water supply system is a set of facilities related to a functional unit with the primary aim ofensuring sufficient quantities of quality water by the most economical way. Design and implementationof such systems requires extensive previous research and analysis aimed at finding the optimal solutionof water supply system.This paper presents an analysis of the pressure pipeline of the water supply system in which discussedseveral alternatives with different input parameters. It is shown the influence of the position and thenumber of tanks in the system on the basic parameters such as a pressure in the pipeline, power of pumpunits and so on. It's analyzed the impact of changes in diameter of the pipe to the hydraulic parameters,and also to the initial and operating costs of the system. The main aim of the complete analysis is toestablish a uniform depending of the analyzed elements in the system and finding the optimalparameters and their relationship that provide the most appropriate solution from the technical andeconomic aspects.

Functional Reliability Analysis of Post-Earthquake Water Supply System

2013 ◽  
Vol 438-439 ◽  
pp. 1551-1554
Author(s):  
Shuang Hua He
Keyword(s):  
Water Supply ◽  
Reliability Analysis ◽  
Distribution System ◽  
Water Distribution ◽  
Supply System ◽  
Water Supply System ◽  
Control Analysis ◽  
First Order Second Moment ◽  
Functional Reliability ◽  
Dependent Demand

Conventional demand-driven models of water supply system are formulated under the assumption that nodal demands are statistic constants, which is not suitable for the cases where nodal pressure is not sufficient for supplying the required demand. An efficient approach for pressure-dependent demand analysis was developed to simulate the hydraulic states of the network for low pressure scenarios, and the mean-first-order-second-moment method was introduced to do the functional reliability analysis of post-earthquake water supply system, which can be applied to further study for seismic performance control analysis of water distribution system.

scholarly journals Research solutions technical - water technology to reduce the water loss for water supply system of Hochiminh city

2013 ◽  
Vol 16 (1) ◽  
pp. 49-57
Author(s):  
Tuan Anh Vo
Keyword(s):  
Water Supply ◽  
Water Loss ◽  
Salt Water ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Supply System ◽  
Water Supply System ◽  
The Sustainable Development ◽  
Pipe System ◽  
Pipe Line

The HCMC water supply system have built from the French Colonial period, and developed without planning and systematic study during the war time. In the beginning, this system used for the small town Saigon- Gia Dinh. Today, the capacity of water supply system is 1,85 million m3/day and will increase up to 2,5 million in next few year and up to 4-5 million m3/day according with the HCMC water supply system planning approved by Government. The climate change issues, salt water lever increase, polution... affect directly into the raw water resource of the existing and future water treatment plant. Beside that, the big size water supply transmission pipe line and the distribution water supply system of 06 hydrolique zone in HCMC damaged according with time : bad quality and No- update information of pipe system… It bring the real water loss level in HCMC so high up to 40% - 50% .The acceptable technologies & techniques solution to find the leak, optimal management for the water supply system to reduce the water loss is extremely essential, to support the clean water resources for the sustainable development of the HCM City.

scholarly journals Rehabilitation Planning of Water Distribution neTwork through a Reliability – Based Risk Assessment

2017 ◽  
Author(s):  
Marianna D'Ercole ◽  
Maurizio Righetti ◽  
Gema Raspati ◽  
Paolo Bertola ◽  
Rita Maria Ugarelli
Keyword(s):  
Water Supply ◽  
Distribution System ◽  
Water Distribution ◽  
Climate Change Impacts ◽  
Water Distribution Network ◽  
Supply System ◽  
Water Supply System ◽  
Analysis Model ◽  
Output Analysis ◽  
Support Tool

The management of existing water distribution system (WDS) is challenged by ageing of infrastructure, population growth, increasing of urbanization, climate change impacts and environmental pollution. Therefore, there is a need for integrated solutions that support decision makers to plan today, while taking into account the effect of these factors in the mid and long term. The paper is part of a more comprehensive project, where advanced hydraulic analysis for WDS is coupled with a dynamic resources input-output analysis model. The proposed modeling solution can be used to optimize the performance of a water supply system while considering also the energy consumption and consequently the environmental impacts. Therefore, as a support tool in the management of a water supply system also in the intervention planning. Here a possible application is presented for rehabilitation/replacement planning while maximizing the network mechanical reliability and minimizing risk of unsupplied demand and pressure deficit, under given economic constraints.

scholarly journals Exergy Evaluation of a Water Distribution System

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6221
Author(s):  
Jedrzej Bylka ◽  
Tomasz Mróz
Keyword(s):  
Water Treatment ◽  
Energy Loss ◽  
Water Supply ◽  
Case Studies ◽  
Distribution System ◽  
Distribution Systems ◽  
Water Distribution ◽  
Water Distribution System ◽  
Supply System ◽  
Water Supply System

The water supply system is one of the most important elements in a city. Currently, many cities struggle with a water deficit problem. Water is a commonly available resource and constitutes the majority of land cover; however, its quality, in many cases, makes it impossible to use as drinking water. To treat and distribute water, it is necessary to supply a certain amount of energy to the system. An important goal of water utility operators is to assess the energy efficiency of the processes and components. Energy assessments are usually limited to the calculation of energy dissipation (sometimes called “energy loss”). From a physical point of view, the formulation of “energy loss” is incorrect; energy in water transport systems is not consumed but only transformed (dissipated) into other, less usable forms. In the water supply process, the quality of energy—exergy (ability to convert into another form)—is consumed; hence, a new evaluation approach is needed. The motivation for this study was the fact that there are no tools for exergy evaluation of water distribution systems. A model of the exergy balances for a water distribution system was proposed, which was tested for the selected case studies of a water supply system and a water treatment station. The tool developed allows us to identify the places with the highest exergy destructions. In the analysed case studies, the highest exergy destruction results from excess pressure (3939 kWh in a water supply system and 1082 kWh in a water treatment plant). The exergy analysis is more accurate for assessing the system compared to the commonly used energy-based methods. The result can be used for assessing and planning water supply system modernisation.

scholarly journals Design and Analysis of Rural Water Supply System Using Loop 4.0 and Water Gems V8i for Nava Shihora Zone 1

2019 ◽  
Vol 9 (1) ◽  
pp. 2258-2266
Keyword(s):  
Water Supply ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Extended Period ◽  
Supply System ◽  
Water Supply System ◽  
Residual Chlorine ◽  
Residual Pressure ◽  
Rural Water

The study presents the hydraulic design and analysis of Rural Water Distribution System (WDS) for Nava shihora region of zone 1 of the state of Gujarat, India. Water supply distribution system is designed for this study for population estimated for future 30 years. LOOP 4.0 and Water Gems v8i software have been used and the results are compared to determine the economical size of pipes for water distribution system. The economical size of pipes of water supply distribution system is designed by considering the constraints; residual pressure at each node, velocity of flow in pipe, head loos in pipes, material of pipes, elevated service reservoir level, peak factor and available commercial pipe diameters. Further water distribution system has been analyzed for extended period simulation (EPS) for the present population scenario for intermittent water supply using Water Gems v8i. Further water supply system is analyzed the residual chlorine concentration at nodes and in the pipe links and also the total cost of water supply system of rural region is estimated.

scholarly journals Rehabilitation Planning of Water Distribution Network through a Reliability – Based Risk Assessment

2018 ◽  
Author(s):  
Marianna D'Ercole ◽  
Maurizio Righetti ◽  
Gema Raspati ◽  
Paolo Bertola ◽  
Rita Maria Ugarelli
Keyword(s):  
Water Supply ◽  
Distribution System ◽  
Water Distribution ◽  
Climate Change Impacts ◽  
Water Distribution Network ◽  
Supply System ◽  
Water Supply System ◽  
Analysis Model ◽  
Output Analysis ◽  
Support Tool

The management of existing water distribution system (WDS) is challenged by ageing of infrastructure, population growth, increasing of urbanization, climate change impacts and environmental pollution. Therefore, there is a need for integrated solutions that support decision makers to plan today, while taking into account the effect of these factors in the mid and long term. The paper is part of a more comprehensive project, where advanced hydraulic analysis for WDS is coupled with a dynamic resources input-output analysis model. The proposed modeling solution can be used to optimize the performance of a water supply system while considering also the energy consumption and consequently the environmental impacts. Therefore, as a support tool in the management of a water supply system also in the intervention planning. Here a possible application is presented for rehabilitation/replacement planning while maximizing the network mechanical reliability and minimizing risk of unsupplied demand and pressure deficit, under given economic constraints.

scholarly journals Development of the Energy Circuits of Development of Contour Regulation of the Supply of Hot Water for Buildings With Variable Flow

2021 ◽  
Vol 7 (1) ◽  
pp. 230-237
Author(s):  
J. Shan ◽  
J. Li ◽  
Z. Guo ◽  
A. Levtsev
Keyword(s):  
Water Supply ◽  
Check Valve ◽  
Supply System ◽  
Water Supply System ◽  
Hot Water ◽  
Actual Measurement ◽  
High Rise ◽  
Hot Water Supply ◽  
Hot Water Supply System ◽  
The Impact

The hot water supply system is one of the important components of the water supply and drainage system of high-rise civil buildings. With the development of the national economy and the improvement of people’s living standards, people’s requirements for popularizing hot water supply and improving hot water supply technology are becoming more and more urgent. In the process of hot water supply, the flow pressure of the pipeline is increased, and the purpose of hot water supply in high-rise buildings is achieved. The experiment analyzes the effect of the pressure ratio on the pipeline in front of the accumulator and the impact valve on the flow of coolant through the check valve. First, through the periodic opening and closing of the shock valve, the pressure continues to rise and fall, and the spring hose exhibits periodic pulsation. The effects of different pressure ratios on pipeline pressure and flow rate are studied, and the data of simulation calculation and actual measurement are analyzed through experiments. The research results have practical significance for improving the water supply efficiency of the hot water supply system of high-rise buildings.

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